Cisco CRC Errors

Have a point to point leased T1 line from NY to Florida - Cisco 3600 in NYC and a 2600 in Fl. It is taking input and CRC errors at both ends. Had the telco run a 2 hour stress test last night and they state the circuit is clean. I am not seeing any packet loss or latency, just the errors themselves. I can post configs or stats for either router if someone could help me out or advise me what else I might check. Last week someone on this site helped me get the clocking set correctly as I was getting slip secs - that corected the issue at my other location that is connected to NYC...but not the Florida location - after monitoring I still see CRC and input errors. They seem to be accruing more rapidly in the NY 3600 as opposed to the Fl 2600.

I'm not sure how they would have tested end-to-end when they don't have access to your equipment... [|-)
End to end means they send techs out to both sites with T-birds and test between them.
Clocking/timing

Also - if it is worth anything - the NYC 3600 has 2 additional T1's connected to it - one is on the same card and one is on a different card - but neither of these are taking errors. All of the extended dmarcs are the same distance from the 3600 in my server room, as far as I know.

Also, do you have remote access to FL when the line is down? If so, you can try some of your own testing by turning up a loop on one side and sending extending pings with different patterns.

2) NYC sounds right for cable length. The demarc is extended, but the point of entry (telco demarc) is still on the ground floor.
FL the default is 0db. This is usually fine, but you may want to bump this is you are several hundred feet from the telco demarc.

3) I've run into both situations with leased lines, that's why its best to check with the Telco on clocking. Reading your last question, it sounds like you've tried both options already, however...

How is the NY-NJ clocking configured? Which side is line, which side is internal?

Talked to telco - they state they tested end to end - CSU to CSU - they state it is clean - asked them about who is providing the clocking - they state they are not providing the clocking - however they referred to it as timing...not clocking - if that matters.

I do not have access to the FL site when the circuit is down.

For both NY-FL and NY-NJ I have the NY side as line and the remote sites as internal

New Server 172.16.200.2 was moved from behind Router R2 f0/1 to behind router R1 int f/01 and has now address 172.16.100.2. But we want users still to be able to connected to it by old IP. How to do it ? We can used destination NAT (DNAT). In DNAT…

This article is a guide to configure bridging on Cisco Routers. This is something I never knew was possible until after making a few phone calls to Cisco. Using bridging saved our company money by not requiring us to purchase a new switch. Bridgi…

After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…